Bi-variant and multiple variant logistic regression of 30-day mortality
| Variable | Bivariable analysis | Multivariable analysis | ||
| OR | (95% CI) | OR | (95% CI) | |
| Age (years) | ||||
| <50 | 1.0 | – | 1.0 | – |
| 50–59 | 2.6 | 0.3 to 27.5 | 2.6 | 0.2 to 37.8 |
| 60–69 | 1.9 | 0.2 to 18.6 | 1.8 | 0.1 to 41.6 |
| 70–79 | 7.8 | 0.8 to 76.1 | 5.4 | 0.1 to 313.6 |
| ≥80 | 12.0 | 1.1 to 128.8* | 9.7 | 0.1 to 1116.5 |
| Sex | ||||
| Male | 1.0 | – | 1.0 | – |
| Female | 0.4 | 0.1 to 1.3 | 0.6 | 0.1 to 3.0 |
| BMI (kg/m2) | 0.9 | 0.9 to 1.0 | 1.04 | 0.9 to 1.22 |
| Pre-hospital symptom duration | 1.1 | 0.9 to 1.2 | 1.1 | 0.9 to 1.4 |
| Diabetes | 0.9 | 0.3 to 2.4 | 0.9 | 0.2 to 38.6 |
| Hypertension | 1.3 | 0.5 to 3.3 | 2.0 | 0.3 to 12.0 |
| Asthma | 0.3 | 0.1 to 2.7 | 2.7 | 0.2 to 38.6 |
| COPD | 0.5 | 0.1 to 5.0 | 0.1 | 0.1 to 1.8 |
| Other cardiac condition | 0.9 | 0.3 to 2.7 | 1.2 | 0.2 to 8.4 |
| OSA | 2.0 | 0.3 to 12.6 | 37.4 | 1.2 to 1204.8 |
| Other comorbid illness† | 0.7 | 0.3 to 1.8 | 0.2 | 0.2 to 1.1 |
| Smoked | ||||
| Never | 1.0 | 1.0 | – | |
| Ever/current | 1.5 | 0.6 to 4.0 | 2.63 | 0.6 to 12.3 |
| Clinical frailty scale22 | 1.2 | 0.9 to 1.6 | 1.5 | 0.5 to 5.0 |
| Mortality 4C score23 | 1.03 | 1.0 to 1.1* | 1.0 | 0.91 to 1.05 |
| Exercise tolerance (m)‡ | ||||
| >1500 | 1.0 | – | 1.0 | – |
| >1000 | 1.9 | 0.5 to 7.2 | 2.04 | 0.3 to 12.0 |
| >500 | 5.3 | 1.4 to 20.8* | 5.3 | 0.53 to 54.8 |
| >100 | 2.3 | 0.2 to 28.9 | – | – |
| >50 | 0.9 | 0.1 to 9.1 | 0.7 | 0.9 to 1.4 |
| <50 | 1.2 | 0.2 to 6.6 | 0.2 | 0.0 to 41.6 |
*Significant at p<0.05.
†Other significant clinical past medical history.
‡Self-reported.
BMI, body mass index; COPD, chronic obstructive pulmonary disease; OSA, obstructive sleep apnoea.